Dudley Joseph LeBlanc (August 16, 1894 – October 22, 1971) was an American entrepreneur and politician. He created the patent medicine Hadacol and promoted it through the 'Hadacol Caravan' which featured major celebrities of the day including Mickey Rooney, Ava Gardner, Cesar Romero, Hank Williams, and many others. Williams began writing the song 'Jambalaya' while traveling on the Hadacol bus, listening to the Cajun conversation. LeBlanc can be seen as a contestant on the 1st March 1951 edition of You Bet Your Life in which he describes his political career.